To be fair, Amazon.de offers quite a few ebooks in German... if you don't mind the *cough*lock-in*cough*

... but those German books are not (always?) available for customers outside Germany.
After reading your message, I browsed through the available titles on Amazon.de, and indeed, I got the message that, since I'm not in Germany, I have to order through Amazon.com. But there I was told that the title I was interested in, 'was not available for my country'.